tqcq
99c258107b
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Co-authored-by: tqcq <99722391+tqcq@users.noreply.github.com> Reviewed-on: #2
172 lines
6.6 KiB
C++
172 lines
6.6 KiB
C++
/*
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* Copyright (c) 2013 - 2016, Roland Bock
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* Copyright (c) 2017, Juan Dent
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "TabSample.h"
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#include <cassert>
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#include <sqlpp11/alias_provider.h>
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#include <sqlpp11/functions.h>
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#include <sqlpp11/insert.h>
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#include <sqlpp11/remove.h>
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#include <sqlpp11/select.h>
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#include <sqlpp11/sqlite3/connection.h>
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#include <sqlpp11/transaction.h>
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#include <sqlpp11/update.h>
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#include <iostream>
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#include <vector>
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namespace sql = sqlpp::sqlite3;
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const auto tab = TabSample{};
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void testSelectAll(sql::connection& db, size_t expectedRowCount)
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{
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std::cerr << "--------------------------------------" << std::endl;
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size_t i = 0;
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for (const auto& row : db(sqlpp::select(all_of(tab)).from(tab).unconditionally()))
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{
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++i;
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std::cerr << ">>> row.alpha: " << row.alpha << ", row.beta: " << row.beta << ", row.gamma: " << row.gamma
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<< std::endl;
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assert(static_cast<size_t>(row.alpha) == i);
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};
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assert(i == expectedRowCount);
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auto preparedSelectAll = db.prepare(sqlpp::select(all_of(tab)).from(tab).unconditionally());
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i = 0;
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for (const auto& row : db(preparedSelectAll))
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{
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++i;
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std::cerr << ">>> row.alpha: " << row.alpha << ", row.beta: " << row.beta << ", row.gamma: " << row.gamma
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<< std::endl;
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assert(static_cast<size_t>(row.alpha) == i);
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};
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assert(i == expectedRowCount);
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std::cerr << "--------------------------------------" << std::endl;
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}
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namespace string_util
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{
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std::string ltrim(std::string str, const std::string& chars = "\t\n\v\f\r ")
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{
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str.erase(0, str.find_first_not_of(chars));
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return str;
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}
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std::string rtrim(std::string str, const std::string& chars = "\t\n\v\f\r ")
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{
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str.erase(str.find_last_not_of(chars) + 1);
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return str;
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}
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std::string trim(std::string str, const std::string& chars = "\t\n\v\f\r ")
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{
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return ltrim(rtrim(str, chars), chars);
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}
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}
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int Select(int, char*[])
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{
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sql::connection db({":memory:", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, "", true});
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db.execute(R"(CREATE TABLE tab_sample (
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alpha INTEGER PRIMARY KEY,
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beta varchar(255) DEFAULT NULL,
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gamma bool DEFAULT NULL
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))");
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testSelectAll(db, 0);
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db(insert_into(tab).default_values());
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testSelectAll(db, 1);
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db(insert_into(tab).set(tab.gamma = true, tab.beta = " cheesecake "));
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testSelectAll(db, 2);
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db(insert_into(tab).set(tab.gamma = true, tab.beta = " cheesecake "));
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testSelectAll(db, 3);
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// test functions and operators
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db(select(all_of(tab)).from(tab).where(tab.alpha.is_null()));
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db(select(all_of(tab)).from(tab).where(tab.alpha.is_not_null()));
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db(select(all_of(tab)).from(tab).where(tab.alpha.in(1, 2, 3)));
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db(select(all_of(tab)).from(tab).where(tab.alpha.in(sqlpp::value_list(std::vector<int>{1, 2, 3, 4}))));
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db(select(all_of(tab)).from(tab).where(tab.alpha.not_in(1, 2, 3)));
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db(select(all_of(tab)).from(tab).where(tab.alpha.not_in(sqlpp::value_list(std::vector<int>{1, 2, 3, 4}))));
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db(select(count(tab.alpha)).from(tab).unconditionally());
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db(select(avg(tab.alpha)).from(tab).unconditionally());
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db(select(max(tab.alpha)).from(tab).unconditionally());
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db(select(min(tab.alpha)).from(tab).unconditionally());
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db(select(exists(select(tab.alpha).from(tab).where(tab.alpha > 7))).from(tab).unconditionally());
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db(select(trim(tab.beta)).from(tab).unconditionally());
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// db(select(not_exists(select(tab.alpha).from(tab).where(tab.alpha > 7))).from(tab));
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// db(select(all_of(tab)).from(tab).where(tab.alpha == any(select(tab.alpha).from(tab).where(tab.alpha < 3))));
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db(select(all_of(tab)).from(tab).where((tab.alpha + tab.alpha) > 3));
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db(select(all_of(tab)).from(tab).where((tab.beta + tab.beta) == ""));
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db(select(all_of(tab)).from(tab).where((tab.beta + tab.beta).like(R"(%'\"%)")));
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// update
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db(update(tab).set(tab.gamma = false).where(tab.alpha.in(1)));
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db(update(tab).set(tab.gamma = false).where(tab.alpha.in(sqlpp::value_list(std::vector<int>{1, 2, 3, 4}))));
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// remove
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db(remove_from(tab).where(tab.alpha == tab.alpha + 3));
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auto result = db(select(all_of(tab)).from(tab).unconditionally());
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std::cerr << "Accessing a field directly from the result (using the current row): " << result.begin()->alpha
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<< std::endl;
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std::cerr << "Can do that again, no problem: " << result.begin()->alpha << std::endl;
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std::cerr << "--------------------------------------" << std::endl;
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auto tx = start_transaction(db);
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for (const auto& row : db(select(all_of(tab), select(max(tab.alpha)).from(tab)).from(tab).unconditionally()))
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{
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const int64_t x = row.alpha;
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const int64_t a = row.max;
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std::cout << ">>>" << x << ", " << a << std::endl;
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}
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for (const auto& row :
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db(select(tab.alpha, tab.beta, tab.gamma, trim(tab.beta))
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.from(tab)
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.unconditionally()))
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{
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std::cerr << ">>> row.alpha: " << row.alpha << ", row.beta: " << row.beta << ", row.gamma: " << row.gamma
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<< ", row.trim: '" << row.trim << "'" << std::endl;
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// check trim
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assert(string_util::trim(row.beta.value()) == row.trim.value());
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// end
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};
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for (const auto& row : db(select(all_of(tab), select(trim(tab.beta)).from(tab)).from(tab).unconditionally()))
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{
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const int64_t x = row.alpha;
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const std::string a = row.trim;
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std::cout << ">>>" << x << ", " << a << std::endl;
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}
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tx.commit();
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std::cerr << "--------------------------------------" << std::endl;
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return 0;
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}
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